Railway-brake.



PATENTED JUNE 9, 1908.

A. L. STREBTER. RAILWAY BRAKE.

APPLIGATloN FILED AUG.5.1907.

2 SHEETS-SHEET 1.

PATENTED JUNE 9, 1908.

A, L. STREBTER.

RAILWAY BRAKE.

APPLICATION FILED AUG. 5, 1907.

Jze?? of? away ffffee@ prevent chatterint of the brakes end lochgo Without any golting or iairing. These ends y ignated e. resilis ons l'eatures, ci

3e is a bottoni pion view'- ot I shown in dotted lines, illustrating va standard' resiliator.

315 spring being shown in section. Fig. Sis a ,perspective view of the forni of fio of 2.

inner hung i, cylinder levers dead brake iev t5 of the floating' lever 5 Vwith the hand brake.

ALFRED L. STREETEl-, OF CHICAGO, ILLINOIS No.. @8i-2,9534.. Specification of Application led August 5,

Letters Patent.

i907. Serial No. 387,070.

Patented June 9, 1908.

Be it known that I, ALFRED L. STREETER, a citinen of the United States, and a resident of Chicago, in the county of Cool; and State To all whomi mcy concern: l

5 of illinois, have invented certain new and useful Improvements in Railway-Brakes, of,

which the following is a specification.

This invention relates te railway brakes,

and relates particularly to foundation' brake l l() gears.

Among-.toe objects oi' the invention' is to provide a brake gear'iwhchwill be ellicient in operation, that is, 'will `apply the brakesy quickly and with full force, and which. will ing of the car Whee s against turning by the brakes, with their incident objectionable fea-` tures, and by ineens ot which the car will be stopped quioi'ly' rand with a smooth motion have accomplisned by the use, in connection with bri :e g ot adevice, which for purposes otconvi- ,4 reference, lliave desi1, consisting oil the vari- ,iinations features fand yation hereinafter described details of censor. and claimed.

known in the art and Will be readily understood by those skilled in the art Without fur-v ther detailed description thereof.

At A, Fig. 1, l have indicateda resiliator of my invention applied to the cylinder lever tie rod 4, said resiliator being connected t0 different sections of said connecting rod and forming of yielding section thereon.

Broadly stated, my improved resiliator consists of tWo overlap' ing tension members adapted to play len tliwise, formed on the overlapping ends o which are stops or flanges between Which is inserted a stiff cushion, preferably a coiled s ring of sufficient strength, Awhich surroundii the overlapping portion of said tension members as guides. lThe ends of said tension members opposite to those on which said stops or ilenges are .formed roject through said cushion and are provi ed with means for attachment to sections of a brake gear connecting rod or other desired parts.

Specifically, my improved resiliator admits of embodiment in dillerent forms and I do not, therefore, desire to limit myself to -the perticularforms thereof shown in the drawings;

in the acconti@w drawings, in which my invention is indy illnstretedfwigure l one end ot e ear,

type of bre-ke gear embed ing my improved Fig. 2 is an en arged side view" of one form of my improved .res1hator, the

resiliator shown in Fig. 2, when assembled, the spring being omitted. vFig. 4 is an end view thereof. Fig. 5 is e sectional view on the line 5*@5 F 6 is a longitudinal sectional view of a modified forni of Vresilietor enibodyinginy invention; and Fig., 7 is a sectionalview thereof on the line 7&7 of Fig. 6,

The bi'ekegear shown in llig. l lis of 'the Referring now articulsrly to Figs. 2 to 5, inclusive, oi the rawings, in Which the form of resiliator of iny invention is illustrated in detail, .12 designates the tension members, consisting, as shown, of .similar open ended links adapted to bel interloolred at right an- Will play lengthwise relatively to earch other. Formed on the sides of the links l2 at the overlappin open ends thereof are flanges '13, inserte between which is acoiled spring 14 Which'surrounds the -the links 12 as guides. Said spring will also operete to maintain said links 12 interlocked in operative position. As shown, the eXterior surfaces of the links 12 are circular, being slightly smaller than the opening throu h type comprising a brake cylinder' 2 and 3 connected byl a tie rod e, a Heating lever 5 connected-snbstenu tially at its center to the cylinder lever 2 by a connecting rod o, a live brake lover 7, a 8, a lower brake rod 9, a pull or comiecting rod 10 connecting one end of the floating leves` 5 With the upper endv oi the live bralrelever and a hand broke eonmeeting rod l.. connecting the opposite end.

the epring '14. lSaid links may, however, e of any other desired form in cross-section. Adjacent to the flanges i3, the links 12 are of the ull width, as shown et 15, being reduced in width throughout the rest of their length, the relation being such that the edges ofthe wide portions l5 of each link will embrace the ynarrowv portion oi" the other, thus forming guides therefor to hold the same in alinenient. .Vihen the links' 12ers interlocked, shoulders 16 at the ends of the Wide portions theio'regoing parte are old ond-Well i .Allof i l5 of different links will be opposed tro-each gies, as best shown in Fig. 3, vso that they overlapping ends of.

ico

naar smits corr vit be desired that the brakes beapplied yieldingly at first and positively at the end,

the spaces 17 may be made ofsuch length that compression of the spring 14'by applicavtion of the brakes with less than full power,

lwill bring opposed shoulders 16 intocontact,

after which no further play of the'links 12v will be ossible, thus forming a rigid connection an applying the brakes positively.

In order 'to provide for interlockin the i' -links 12, the minimum dimension o the flanges 13, the dimension a, Fig. 4, will have tween the sides of said links.

My improved resiliator is adapted to be connected into the brake. gear by securing the partsto be connected into the loops 18 lto be'less than the width of the opening be-f thereof, which project through the spring 14,

when the resiliator is assemb ed.

The length and stiifness of the spring 14 will, of course, vary according .to the-duty required of its In street car service, I have yused, with satisfactory results, springs made of square steel 9/16 X 9/1'6 in cross section, 8 in length, when uncompressed, and

Wound with 1/4 spaces between adjacent coils.

I contemplate applying my resiliator at any place in the bra e gear. But owing to r `the fact that the leverage is arranged to multiply the power ofthe cylinder pressure when applied, to the brake shoes, the compression o the resiliator spring 14, if applied at a ploint close to the brake shoes, would A uce an undesirable piston travel. For this reason, I prefer to apply the resiliator in such manner that its compression will not be multiplied, -a' desirable location therefor being in the cylinder lever tie rod 4. A further 4advantage of'this application is that a single resiliator will answer for the entire brake gear at both-ends of the car.

In order to save piston travel, in compression' of the resiliator spring., my invention contem lates a resiliator so constructed that the sprmg will, at all times, be under a partial initial com-pression, the means for eil'ecting such initial compression being self-contained in the resiliator so as not to exert any pull or strain on 'the brake gear. y

In Figs. 6 and 7 I have shown a resiliator of this character, which I will now describe. In this form of the resiliator, the tension members consist of a rod 19, and a sleeve 20- pro-1.

i scarica which surrounds said rod. As indicated, said rod forms a section of the cylinder lever tie rod 4, butv mayequally well be any of theother brake gear connections or -a separate rod, adapted for connection to a part of the brake gear. the ends of which extend throu h slots 22'in the sleeve 20, providing for re ative movement of said rod and sleeve. pinl 21 forms a support'for a thrust washer 23, but my invention contem lates the omissionof said thrust washer, if esired. v. Screw threaded to the sleeve 20 at a distancelfrom Secured in the rod 4 1s a pin 21, K

As shown, said theslots 22 is a nut or nuts 24 and inserted between said collar23 and nut or nuts 24 is a coiled.l spring 25, which surrounds the out-v side of the sleeve 20 as a guide. .The tie rod 4 consists of two se aratesections, the section 41 being ada te to be coupled to an eX- itension of the seeve 20, as by a bolt 26;

whichpassesI through suitable holes or openings in said sleeve and rod, the relation being such that the sections 4 and 41 of said rod will always be separated by a space.

With the described" construction, it is obvious that the spring 25 may'besubjected to any desired initial compressionby setting u the n ut or nuts 24 andl that the force of sai spring will be entirely self-containedv inthe sleeve 20 of the resiliator, merely subjectingl thewasher 23, supported by the pin 21, an

nut or nuts 24, to a'thrust, Without exertingy any stress whatever on the rod sections 4 and 41. When, however, the-brakes are applied,

1. A resiliator comprising tension niembers constructed and arranged to play lengthwise relatively to each other and adapted for attachment to parts of a brake gear,

stops on said tension members, a spring 1nserted between said stops and means selfcontained in one -tensior'i member of-said resiliator whereby said `spring can be maintained under an initial compression without varying the operative length of the resiliator.

2. A resiliator comprising tension members constructed and arranged to play length- 1 wise relatively to each other and adapted for attachment to parts of a brake gear, sto s on said tension members, a sprin inserte between said stops and adjustab e means selfcontained one of said tension members whereby said spring can be maintained unf in said which j sleeve7 a nut threadedto said sleeve at a distance from'saidfstop pin, and a spring inserted between said stop pin and nut. Y

6. ,A resiliatorcognprising a rod, a sleeve which surrounds said rod, provided with longitudinal slots, a stop pin secured in said rod which projects through the slots in said sleeve, a washer adapted; to bear against der an initial com ression without ,varying the operative length) ofthe resiliator;

3. A resiliator comprising a rod, a sleeve which surrounds said rod, provided with longitudinal slots, a stop pin secured in said rod 4. A resiliator comprisinga rod, a sleeve tance-from said s ring inwhich surrounds said rod, provided with longitudinal slots, a stop pin secured in said rod which projects outwardly through the slots sleevel an adjustable stop on said sleeve at a distance from said stoppin and a sprlng justahle stop.

stop pin and a said sleeve. i

In testimony, that I claim'the foregoing as my invention, I a mysignature 1n presence o1" Vtwo subscribing witnesses, this 24th day of July, A. D, 1907. I n

' ALFRED L. STREETER.

Witnesses:

5. A resiliator comprising a rod, a sleevel which surrounds said rodrprovided wlth lon- JOSEPH B. MULLIGAN, gltudinal slots, a stop pin secured in said rod FRED. W. ROTH.

serted between said washer and sai( stop on.

projects through the slots said 

